| 摘要 |
PURPOSE: An in-building repeater system for mobile communication using a variable impedance matching device is provided to construct the in-building system for mobile communication with cheaper cost. CONSTITUTION: Equipment output impedance matching of a cellular phone in-building signal repeater system (cellular system : 824-849 MHz,869-894 MHz), an in-building repeater system of personal portable communication bandwidth (personal communication system (PCS) mode : 1750-1780 MHz,1840-1870 MHz), and an in-building repeater system of wideband code division multiple access (WCDMA) (1840-1980 MHz, 2130-2170 MHz) is designed as 75 ohm. A matching device converts the impedance from 50 ohm to 75 ohm. The matching device converts the impedance from 75 ohm to 50 ohm. [Reference numerals] (AA) Yagi antenna (input Impedance 75ohm); (BB) Patch antenna (input Impedance 75ohm); (CC) Omni antenna (input Impedance 75ohm); (DD) Sector antenna (input Impedance 75ohm); (EE) Output AMP; (FF) Input AMP; (GG) Impedance 75ohm matching unit; (HH) Telecommunication relay unit; (II) System output port; (JJ) 75ohm coaxial cable |
